arch template: Fix systemd-sysctl service
arch template: Fix systemd-sysctl service

The systemd-sysctl service includes condition that /proc/sys/ has to be read-write.
In lxc only /proc/sys/net/ is read-write which causes the condition to fail and service not to run.
This patch changes the check to /proc/sys/net/ and makes the service apply only rules that are in net tree.

Signed-off-by: Jakub Sztandera <77246600354bed77252577b0222eb63e0827639a@gmail.com>

aeris/lxc,armcc/lxc,terceiro/lxc,fwilson42/lxc,caglar10ur/lxc,DarknessBeforeDawn/lxc,hallyn/lxc,akshaykarle/lxc,GreatFruitOmsk/lxc,DarknessBeforeDawn/lxc,LynxChaus/lxc,fwilson42/lxc,caglar10ur/lxc,bostjan/lxc,terceiro/lxc,tych0/lxc,ss1h2a3tw/lxc,akshaykarle/lxc,hfuCN/lxc,Distrotech/lxc,hallyn/lxc,tych0/lxc,Distrotech/lxc,ksperis/lxc,ysbnim/lxc,thmo/lxc,ysbnim/lxc,aeris/lxc,armcc/lxc,cjwatson/lxc,LynxChaus/lxc,hfuCN/lxc,ysbnim/lxc,bostjan/lxc,caglar10ur/lxc,fwilson42/lxc,tych0/lxc,QingweiPeterLan/cs188-lxc,GreatFruitOmsk/lxc,armcc/lxc,cjwatson/lxc,QingweiPeterLan/cs188-lxc,federicobriata/lxc,terceiro/lxc,federicobriata/lxc,ss1h2a3tw/lxc,DarknessBeforeDawn/lxc,hallyn/lxc,akshaykarle/lxc,thmo/lxc,aeris/lxc,federicobriata/lxc,Distrotech/lxc,hfuCN/lxc,thmo/lxc,QingweiPeterLan/cs188-lxc,ss1h2a3tw/lxc,cjwatson/lxc,GreatFruitOmsk/lxc,bostjan/lxc,LynxChaus/lxc,ksperis/lxc,ksperis/lxc